Annunciator



P. E. FISHER.

ANNUNGIATOR'.

(No Model.)

` Patented Feb. 9, 1886.

nirnn drains artnr trice.

FRANK E. FISHER, OF DETROIT, MICHIGAN.

ANNUNCIATOR.

SPECILFICATION forming part of Letters Patent No.336,001. dated February 9. 1886.

Application filed July 14, 1885.

T0 all whom, it may concern.-

Be it known that I, FRANK E. FISHER, of the city of Detroit, in the county of Vayne and State of Michigan, have invented a new and useful Improvement in Annunciator- Drops, of which the following is a speciiication.

My invention consists in an improvement in annunciator-drops intended to work with alternating currents of electricity, and is hereinafter lt'nlly pointed ont in the claims.

Figure l is a side elevation; Fig. 2, a front elevation with the frame broken away on the lines .ma-Fig. l; and Fig. 3 is an enlarged view of the end of the armature and the weighted drop.

B represents a permanent magnet, U shaped, and with its poles turned toward each other.

A represents a frame made of diamagnetic soft metal-such as lead or type-metal-cast in a mold around the magnet B, and having at the bend of the magnet a lug on each side of the magnet wider than the thickness of the magnet, between which is pivotcd one end or pole of an electro-magnet consisting of apiece of soft iron, D, wound with a helix of insulated wire, C.

M represents one of two pointed screws, one of which is tapped through each lug on the frame A, and whose point enters aV shallow hole in the side of the part D of the electromagnet, thus pivoting said electro-magnet between the screws M, and leaving the other end or pole thereof free to vibrate between the poles of the permanent magnet. rIhe free end of the electro-magnet passes between the poles of the permanent magnet and extends a short distance beyond them, as shown in Fig. l.

I represents a pin made of diamagnetic material, set in the part D of the electro'magnet between the poles of the permanent magnet, and is preferably made longer on one side of the electro-magnet than on the other, as shown, to hold the electro-magnet nearer the upper pole of the permanent magnet, and to permit the proper adjustment of th-e electro-magnet with reference to the catch of the drop. The

pin I also serves to prevent the electro-magnet from. coming in contact with the permanent magnet and sticking thereto.

F represents a shaftjournaled in the frame A, beyond the end ot' the permanent magnet,

Serial No. 171,600. (No model.)

and extending beyond the end of said frame and into a recess formed in the frame just for` tension, Z, so that when left free said catch will :rotate said shaft F until the weighted end Z comes in contact with the frame at the lower side of the recess in which it is placed. On the outer end of shaft F is secured a needle or pointer, H, which is operated by the motion of shaft F.

The operation of myinvention is as follows: The free end of the electro-magnet being at its lowest position and sustained there by the longer end of pin I resting on the lower pole of the permanent magnet, it will engage with hook K and hold the catch E and needle H horizontal, as shown in Figs. l and 2. Now, if the upper pole of the permanent magnet be positive, on passing an alternating current through the helix of the electro-magnet, the part D thereotwill be niagnetized, and its two ends will become poles, which change with every reversal ofthe current. As soon as the free end of the electro-magnet becomes negathe permanent magnet and repelled by the negative pole thereof, and will rise so as to release hook K, when the weighted end of catch E will fall by the action of gravity and osoillate shaft F and needle I'I. As soon as the current ceases,the free end of the electro-magnet falls bythe action of gravity untilchecked by pin I coming in contact with the lower pole of magnet B. On raising catch E,by hand or otherwise, the curved end of hook II raises the electro-magnet until the said magnet falls by gravity behind the point of the hook, and retains the catch and needle in the position shown in Fig. 2, ready for another operation.

Vhat I claim as my invention, and desire to secure by Letters Patent, is-

l. In an annunciator-drop, the combination of a permanent magnet, an electro-magnet pivoted at one pole and having its other pole 'tive,it will be attracted by the positive pole of 85 IOO gg v 336,001

within the eid of force of the poles of the pivoted at one pole by the screws M, damagpermanent magnet, a, weighted catch hung on netic pin I, passing through the electro-mag- 1o a movable shaft, and adapted to engage with net, and the pivoted catch E, substantially as the movable pole of the electro-magnet, amd a shown and described.

5 needle secured to the shaft which carries the FRANK E. FISHER.

catch, substantially as shown and described. Witnesses:

2. The combination of the permanent mag- GEO. H. LOTHROP,

net B, soft-metal frame A, electro-magnet C D, M. A. JACKSON. 

